centrifugal pump

Recently we shipped one batch of mud agitators with control panel to Middle East client. The mud agitator is installed on top of the shaker tank to stir the drilling mud and prevent it from solids precipitation. These mud agitators are installed for liquid mud plant to mix and storage drilling fluids, the user can produce the mud tanks locally to save freight cost and importation cost. The control panel is installed besides the mud agitator for convenient operation, this is GN OEM control panel with our own explosion proof certificate.


The gear box and explosion proof motor is connected directly, this is compact design to be suitable for mud tank which have limit space to install the equipments. When the client need to install their own motor to match the local explosion proof class, we will provide gearbox connected with coupler, one side is connected with gearbox shaft, one side will be connected with the client’s motor, we only need to check the installation drawing of the motor in advance to confirm the suitability. Normally we install the mud agitator on the tank every 3 meters, this is not fixed, will be varies with different drilling fluids conditions.


The mud agitator will be controlled by the control panel installed on one end of mud tank, and ON/OFF SWITCH will be installed besides the mud agitator for convenient operation, the user can control the on/off/emergency stop of the mud agitator easily when it is necessary. The mud gun will be installed to work together for agitating the drilling fluids to prevent it from sediments.
We can provide mud agitator, mud gun, centrifugal pump, mixing hopper, shale shaker, mud cleaner, vacuum degasser, desander, desilter, etc. equipments to the mud tank manufacturers locally, they can produce mud tank and use our equipments.

Recently 4 sets of solids control equipments are ready for shipment to our client, this is the repeat order from the client, they will produce 4 sets of mud tank system locally to produce sea freight cost and import tax. The configuration is as below:


1) 4 sets of shale shaker with 3 panel shaker screens, each shale shaker with 2 no vibration motors. Each shaker installed with API 170 shaker screens
2) 4 sets of 7.5KW mud agitators
3) 36 pcs of composite material frame shaker screens, dimension is 700 x 1250mm
4) 4 sets of mixing venturi hopper with stainless steel material
5) 4 sets of mud gun
6) 2 sets of centrifugal pump as mixing pump


These 4 sets of mud tank system are used for workover rig drilling mud recycling. Each mud tank with 1 unit shale shaker, 1 unit mud agitator, 1 unit mud gun, 1 unit of venture mixing hopper, 1 unit of centrifugal pump as mixing pump to drive the mixing unit. The client produce the mud tank, tank accessories, pipelines, walkways, handrails, stairs, valves, etc.


Compared with oil drilling rig solids control system, the workover rig mud tank system normally with less equipment and do not have strict requirement for the solids removal from the drilling fluids. The common rig solids control system including 2 or 3 units of shale shaker, 1 unit of mud cleaner with 2 unit of centrifugal pumps, 1 unit vacuum degasser, 1 unit of decanter centrifuge for barite recovery, 1 unit of decanter centrifuge for low gravity solids removal. Several units of mud agitator, mud guns for agitating the drilling mud, several units of mixing hopper with mixing pump, several units of charging pump to feed the drilling fluids to mud pump.
For more information, pls contact with GN solids control.

Recently one set of mud recycling system is ready for shipment, this is for China client. The technical configuration is as below:


1) Separation equipment: one unit of shale shaker and one unit of desander, the shale shaker is to separate the coarse solids from the slurry, the clean fluids dropped down to the shale shaker, one set of slurry pump feed the slurry to the 10 inch desander cone to separate the solids cut point 45 microns, the clean fluids drop into the compartment under the desander, the underflow shale shaker can separate the solids drier and reduce the waste solids volume. The client can collect the dry solids easily by cuttings box or waste bag. The linear motion shale shaker with 3pcs screen panels with composite material frame shaker screens, the desander cone material is outter steel for better strength, and inner material is PU material for abrasion resistence. The vibration motor is Italy Oli brand vibrator, and the shaker screens for the shale shaker and underflow shaker is with same size for easier stock.


2) Customized Mud tank with all the accessories and mud agitator, mud gun to agitate the slurry. We can design customized mud tank for different applications.
3) Pump package including mixing pump, trip pump, centrifugal pump on the oilfield skid for convenient movement. The vertical submersible slurry pump is installed to feed the slurry to the desander cone to save space on the mud tank.
The centrifugal pump is interchangeable with world famous brand centrifugal pump, including all the parts, the major wear parts for pump casing and impeller is made of hard ductile iron alloy for better abrasion resistance.
We produce mud recycling system for HDD, CBM, slurry separation and mining tailings treatment, also we produce mud cleaning system for oil and gas drilling. We also provide solution for any waste treatment.

Recently we finished production of one set of solids control system to India, including shaker tank and decanter centrifuge tank system. This is a 5 phase separation mud tank system for 1500HP oil drilling rig. The working principal is as below:


1) 3 units of shale shaker as the first phase cleaning to separate the big solids bigger than 100 microns from the drilling fluids, it can be used for both water based mud and oil based mud or synthetic oil based mud. The shaker screen installed on the shale shaker is composite material frame shaker screens comply with API RP13C.


The possem belly is installed behind the 3 units of shale shaker as drilling fluids distribution box and collect the drilling fluids from the mud gas separator or from the elevated manifold directly.
2) desander cone is the second phase cleaning to separate the cut point below 45 microns. The fluids with solids below 45 microns will drop into the mud tank compartment. The 2# centrifugal pump suck the drilling fluids from this compartment and feed to 4 inch desilter cone.
3) desilter cone is the third phase cleaning to separate the cut point below 25 microns the fluids below 25 microns will drop into the desilter compartment and the submersible slurry pump will suck the mud from this compartment and feed to GNLW452C decanter centrifuge.


4) middle speed decanter centrifuge is the fourth phase cleaning to separate the cut point 5~7 microns for barite recovery.
5) high speed decanter centrifuge is the fifth phase cleaning to separate the solids 2~5 microns for high gravity solids, especially when the drilling fluids has been reused for several years, the fine solids is accumulated a lot and it can not be reused again, then the high speed decanter centrifuge is required to lower the solids content.

2 more construction slurry cleaning system for vacuum tanker vehicle is ready for shipment to USA, this is the client’s repeat order. After use the previous 2 system at their work site successfully, they repeat the order for another 4 units, this is part of their new order. They have given some good suggestions to improve the system efficiency and to be user friendly.
The basic working principal is as below:


The slurry collection hopper collect the construction slurry from vacuum tanker vehicle, this is special designed slurry collection hopper — a large open top hopper with 3-side weir surrounded, 1 side is low weir for slurry feeding from the vacuum tanker vehicle. The coarse solids separation shale shaker is sitting on it, the separated coarse solids/stones are collected by cuttings box, the clean slurry is dropped into the collection hopper and feed to the fine solids separation shale shaker by the submersible slurry pump. The fine mesh screen is installed on the fine solids separation shale shaker with composite material frame shaker screens for longer working life. GN can produce composite material shaker screens comply with API RP13C from API 20 to API 325. The slurry discharged shale shaker is feed to mud cleaner with desilter cone, the separation cut point is 25 microns by centrifugal pump, the discharged solids is drying by the bottom shaker screens.

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The clean slurry is feed to high speed decanter centrifuge by working with dewatering unit by the screw pump, we have different size decanter centrifuge with different treating capacity for option, the bowl size with 9 inch, 14 inch, 18 inch, 22 inch, 30 inch. To get much pure water, sometimes chemical should be add to improve the separation efficiency.
If you have similar project, welcome to contact with GN sales engineer.